Figure 17 Example of a Delta Resync configuration (before a Delta Resync is performed)
Figure 18 Example of a Delta Resync configuration (after a Delta Resync is performed)
2DC Configuration with HyperSwap and Continuous Access Journal
A 2DC configuration with HyperSwap and Continuous Access Journal for Mainframe can continue
operating, even after a HyperSwap is performed.
The HyperSwap functionality reverses the relationship between a P-VOL and an S-VOL by using
TPC-R, when the primary storage system and local storage system are connected to the same host
and a failure occurs during access to the primary storage system. HyperSwap enables the I/O
destination volume to be switched during a primary storage system failure or maintenance, without
stopping operations.
With this configuration, delta resyncs are executed after a HyperSwap, allowing operations to
restart temporarily under a 2DC configuration after the HyperSwap with very little downtime.
48 Business Continuity Manager with replication products
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